What does the breech position mean?

There are many kinds of tire orientations, but they can generally be divided into six types. In a limited space, babies need to move their hands and feet, so they will constantly change their postures. What does breech position mean? Now let's have a look!

What does breech position mean? Generally speaking, the fetal position during pregnancy is divided into three situations: head position, breech position and transverse position. Each situation is also divided into many types, such as breech position, single breech position, mixed breech position, foot presentation and so on. The position of the head is more, and there are more than a dozen subdivisions. But the most common head position is left occipital anterior position, accounting for about 90%. I suggest you take a rest and have regular prenatal check-ups. After 26 weeks of pregnancy, the fetal position will be relatively fixed.

Fetuses often take three positions in the mother's womb, of which the head position is the most, followed by the breech position, and the horizontal position is rare. Diagnosis can generally be made by abdominal palpation, auscultation of fetal heart sounds, anal or vaginal examination and other methods. However, when pregnant women are overweight or have too much amniotic fluid, or when twins are pregnant or the fetus is abnormal, it is difficult to find out the fetal position for a while, and the diagnosis can be made by X-ray photography.

1, head position

The longitudinal axis of the fetus is parallel to the longitudinal axis of the mother, and the fetal head enters the pelvic entrance first, which is called head position, also known as "head position". Most of the exposed heads are well flexed, with occipital bone as the indication point and connected with all directions of pelvic entrance, which are generally divided into six directions, namely left anterior pillow (LOT), right anterior pillow (ROA), left lateral pillow (LOT), right lateral pillow (L0P) and right posterior pillow (R0P).

2, breech position

The longitudinal axis of the fetus is parallel to the longitudinal axis of the mother, and the position where the buttocks first enter the pelvic entrance is called breech position, also known as breech position. The breech position is based on the sacrum, which is connected with the pelvic entrance in all directions. Generally, it is also divided into six directions, namely, left anterior sacrum (LSA), left lateral sacrum (LST), left posterior sacrum (LSP), right anterior sacrum (RSA), right lateral sacrum (RST) and right posterior sacrum (RSP).

3. Lateral position

The longitudinal axis of the fetus is perpendicular to the longitudinal axis of the mother, and the position where the shoulder is exposed first at the pelvic entrance is called transverse position, also known as "showing the shoulder first". The presentation of the shoulder takes the scapula as the indication point and lives in all aspects of the pelvic entrance. Generally, it can be divided into four directions, namely, left shoulder front (LScA), left shoulder back (LScP), right shoulder front (RScA) and right shoulder back (RScP).

What is breech defect? Incomplete breech presentation, one foot or both feet, one knee or both knees, or one foot and one knee presentation is temporary. Due to the narrow pelvis, placenta previa and tumor blocking the pelvis, it is rare to switch to full breech position after delivery. The causes of fetal incomplete breech presentation are as follows:

1. Because of the excessive amniotic fluid, the lying-in woman's abdominal wall is slack, and the premature baby has relatively more amniotic fluid, the fetus is easy to move freely in the uterine cavity to form breech position.

2. Fetal malformation (such as single horn uterus, double horn uterus, etc.). ), fetal malformation (such as hydrocephalus, etc. ), twins and oligohydramnios are prone to breech position.

3. Fetal appellation accepts blocking pelvic stenosis, placenta previa, tumor blocking pelvis, etc. , but also prone to breech position.

The clinical manifestation of breech imperfectness is that the fetal buttocks can't cling to the cervix, which often leads to weak uterine contraction, slow cervical expansion and prolonged labor. Abdominal examination showed that the uterus was vertical and oval, and the fundus touched the round and hard fetal head, which felt like a floating ball. Irregular, soft and wide fetal buttock touches the pubic symphysis, and the fetal heart can be heard most clearly above the left (or right) umbilical cord.

During vaginal examination, touch the soft and irregular fetal buttocks or touch the fetal feet and knees. To understand the degree of uterine dilatation and whether there is umbilical cord prolapse. If the fetal membrane has been broken, it can directly contact the buttocks, external genitalia and anus of the fetus. When the finger is put into the anus, there is a sense of contraction of the annular sphincter, and when the finger is taken out, there is meconium. In B-mode ultrasound examination, the type of breech position, fetal size and fetal head posture can be accurately detected.